Espinoza remained seated as McGregor approached him and barked before also taking one of the multiple verbal swings he landed on Mayweather in Wednesday's appearance.
Meaweather, who was clearly pissed by McGregor's comment, stopped shadowboxing and started to stalk towards the latter, who quickly changed his tune.
Last night's showdown in Toronto was explosive as McGregor sensationally accepted Mayweather's dare to put his whole fight purse on the line.
"I'm 28 years old and I'm getting fight cheques and promoter cheques".
For a second consecutive day on Wednesday, McGregor told Mayweather to "dance for me, boy" during a press event to promote the August 26 fight. Addressing the press McGregor said, "He's in a ******* tracksuit" and added, He can't even afford a suit anymore. McGregor, who seemed out of his element in Los Angeles kicked the door in as he sent a tirade aimed directly at Mayweather and Showtime. McGregor asked. "You can't even read".
The Six God welcomed the two fighters as their promotional tour stopped off in Toronto. UFC President Dana White and Mayweather Promotions front man Leonard Ellerbe both have smiles plastered from ear to ear once their respective mouthpieces get wound up because they truly know the score that is unfolding before them.
Seeing this, McGregor laughed so much, brought the microphone to his lips and said, "Dance for me, boy!".
"Racism still exists but you know, I try to take something negative and turn it into something positive", Mayweather said. "I'm going to knock him out inside four rounds mark my words", as per Indian Express report.
"I would say that when a white person calls you boy, that's not quite the N-word, but it's closer to monkey".
"I'd like to sleep on it, but it took me by surprise", he said. McGregor has never been guaranteed more than $3 million for any fight in his career.
Mayweather is a massive favourite going into the fight, especially given that McGregor has no professional boxing experience.
Things got interesting when Mayweather got hold of an Irish flag.